I would never join any group that gets their beliefs using scripture to dismiss and contradict other scripture. Most do not know Calvin was a Roman Catholic lawyer that became a theologian, and the apple didn’t fall far from the tree. The gospel was given and paid for by Jesus not the Apostle Paul. Paul taught the very same gospel as Jesus. The good news is even though we have all sinned against God if you will believe and place your faith in Jesus repent and follow Jesus you will be saved just as Paul told the jailer what he had to do be saved was believe.